Contributors: 27
Author Tokens Token Proportion Commits Commit Proportion
Roland Dreier 277 23.12% 11 13.10%
Yishai Hadas 190 15.86% 9 10.71%
Jason Gunthorpe 187 15.61% 17 20.24%
Matan Barak 158 13.19% 16 19.05%
Arnd Bergmann 81 6.76% 2 2.38%
Michael Guralnik 62 5.18% 1 1.19%
Jack Morgenstein 55 4.59% 2 2.38%
Sean Hefty 49 4.09% 2 2.38%
Yann Droneaud 27 2.25% 4 4.76%
Hadar Hen Zion 22 1.84% 1 1.19%
Gustavo A. R. Silva 14 1.17% 1 1.19%
Michal Kalderon 14 1.17% 1 1.19%
shamir rabinovitch 11 0.92% 2 2.38%
Parav Pandit 10 0.83% 1 1.19%
Alexander Chiang 6 0.50% 2 2.38%
Gleb Natapov 5 0.42% 1 1.19%
Slava Shwartsman 4 0.33% 1 1.19%
Moses Reuben 4 0.33% 1 1.19%
Raed Salem 4 0.33% 1 1.19%
Maor Gottlieb 4 0.33% 1 1.19%
Christoph Hellwig 3 0.25% 1 1.19%
Guy Levi 3 0.25% 1 1.19%
Ingo Molnar 3 0.25% 1 1.19%
Tony Jones 2 0.17% 1 1.19%
Arjan van de Ven 1 0.08% 1 1.19%
Dan Carpenter 1 0.08% 1 1.19%
Weihang Li 1 0.08% 1 1.19%
Total 1198 84 


/*
 * Copyright (c) 2005 Topspin Communications.  All rights reserved.
 * Copyright (c) 2005, 2006 Cisco Systems.  All rights reserved.
 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
 * Copyright (c) 2005 PathScale, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef UVERBS_H
#define UVERBS_H

#include <linux/kref.h>
#include <linux/idr.h>
#include <linux/mutex.h>
#include <linux/completion.h>
#include <linux/cdev.h>

#include <rdma/ib_verbs.h>
#include <rdma/ib_umem.h>
#include <rdma/ib_user_verbs.h>
#include <rdma/uverbs_std_types.h>

#define UVERBS_MODULE_NAME ib_uverbs
#include <rdma/uverbs_named_ioctl.h>

static inline void
ib_uverbs_init_udata(struct ib_udata *udata,
		     const void __user *ibuf,
		     void __user *obuf,
		     size_t ilen, size_t olen)
{
	udata->inbuf  = ibuf;
	udata->outbuf = obuf;
	udata->inlen  = ilen;
	udata->outlen = olen;
}

static inline void
ib_uverbs_init_udata_buf_or_null(struct ib_udata *udata,
				 const void __user *ibuf,
				 void __user *obuf,
				 size_t ilen, size_t olen)
{
	ib_uverbs_init_udata(udata,
			     ilen ? ibuf : NULL, olen ? obuf : NULL,
			     ilen, olen);
}

/*
 * Our lifetime rules for these structs are the following:
 *
 * struct ib_uverbs_device: One reference is held by the module and
 * released in ib_uverbs_remove_one().  Another reference is taken by
 * ib_uverbs_open() each time the character special file is opened,
 * and released in ib_uverbs_release_file() when the file is released.
 *
 * struct ib_uverbs_file: One reference is held by the VFS and
 * released when the file is closed.  Another reference is taken when
 * an asynchronous event queue file is created and released when the
 * event file is closed.
 *
 * struct ib_uverbs_event_queue: Base structure for
 * struct ib_uverbs_async_event_file and struct ib_uverbs_completion_event_file.
 * One reference is held by the VFS and released when the file is closed.
 * For asynchronous event files, another reference is held by the corresponding
 * main context file and released when that file is closed.  For completion
 * event files, a reference is taken when a CQ is created that uses the file,
 * and released when the CQ is destroyed.
 */

struct ib_uverbs_device {
	refcount_t				refcount;
	u32					num_comp_vectors;
	struct completion			comp;
	struct device				dev;
	/* First group for device attributes, NULL terminated array */
	const struct attribute_group		*groups[2];
	struct ib_device	__rcu	       *ib_dev;
	int					devnum;
	struct cdev			        cdev;
	struct rb_root				xrcd_tree;
	struct mutex				xrcd_tree_mutex;
	struct srcu_struct			disassociate_srcu;
	struct mutex				lists_mutex; /* protect lists */
	struct list_head			uverbs_file_list;
	struct uverbs_api			*uapi;
};

struct ib_uverbs_event_queue {
	spinlock_t				lock;
	int					is_closed;
	wait_queue_head_t			poll_wait;
	struct fasync_struct		       *async_queue;
	struct list_head			event_list;
};

struct ib_uverbs_async_event_file {
	struct ib_uobject			uobj;
	struct ib_uverbs_event_queue		ev_queue;
	struct ib_event_handler			event_handler;
};

struct ib_uverbs_completion_event_file {
	struct ib_uobject			uobj;
	struct ib_uverbs_event_queue		ev_queue;
};

struct ib_uverbs_dmabuf_file {
	struct ib_uobject uobj;
	struct dma_buf *dmabuf;
	struct list_head dmabufs_elm;
	struct rdma_user_mmap_entry *mmap_entry;
	struct phys_vec phys_vec;
	struct p2pdma_provider *provider;
	struct kref kref;
	struct completion comp;
	u8 revoked :1;
};

struct ib_uverbs_event {
	union {
		struct ib_uverbs_async_event_desc	async;
		struct ib_uverbs_comp_event_desc	comp;
	}					desc;
	struct list_head			list;
	struct list_head			obj_list;
	u32				       *counter;
};

struct ib_uverbs_mcast_entry {
	struct list_head	list;
	union ib_gid 		gid;
	u16 			lid;
};

struct ib_uevent_object {
	struct ib_uobject	uobject;
	struct ib_uverbs_async_event_file *event_file;
	/* List member for ib_uverbs_async_event_file list */
	struct list_head	event_list;
	u32			events_reported;
};

struct ib_uxrcd_object {
	struct ib_uobject	uobject;
	atomic_t		refcnt;
};

struct ib_usrq_object {
	struct ib_uevent_object	uevent;
	struct ib_uxrcd_object *uxrcd;
};

struct ib_uqp_object {
	struct ib_uevent_object	uevent;
	/* lock for mcast list */
	struct mutex		mcast_lock;
	struct list_head 	mcast_list;
	struct ib_uxrcd_object *uxrcd;
};

struct ib_uwq_object {
	struct ib_uevent_object	uevent;
};

struct ib_ucq_object {
	struct ib_uevent_object uevent;
	struct list_head	comp_list;
	u32			comp_events_reported;
};

extern const struct file_operations uverbs_event_fops;
extern const struct file_operations uverbs_async_event_fops;
void ib_uverbs_init_event_queue(struct ib_uverbs_event_queue *ev_queue);
void ib_uverbs_init_async_event_file(struct ib_uverbs_async_event_file *ev_file);
void ib_uverbs_free_event_queue(struct ib_uverbs_event_queue *event_queue);
void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res);

int ib_alloc_ucontext(struct uverbs_attr_bundle *attrs);
int ib_init_ucontext(struct uverbs_attr_bundle *attrs);

void ib_uverbs_release_ucq(struct ib_uverbs_completion_event_file *ev_file,
			   struct ib_ucq_object *uobj);
void ib_uverbs_release_uevent(struct ib_uevent_object *uobj);
void ib_uverbs_release_file(struct kref *ref);
void ib_uverbs_async_handler(struct ib_uverbs_async_event_file *async_file,
			     __u64 element, __u64 event,
			     struct list_head *obj_list, u32 *counter);

void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context);
void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr);
void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr);
void ib_uverbs_wq_event_handler(struct ib_event *event, void *context_ptr);
void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr);
int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject, struct ib_xrcd *xrcd,
			   enum rdma_remove_reason why,
			   struct uverbs_attr_bundle *attrs);

int uverbs_dealloc_mw(struct ib_mw *mw);
void ib_uverbs_detach_umcast(struct ib_qp *qp,
			     struct ib_uqp_object *uobj);

struct bundle_alloc_head {
	struct_group_tagged(bundle_alloc_head_hdr, hdr,
		struct bundle_alloc_head *next;
	);
	u8 data[];
};

struct bundle_priv {
	/* Must be first */
	struct bundle_alloc_head_hdr alloc_head;
	struct bundle_alloc_head *allocated_mem;
	size_t internal_avail;
	size_t internal_used;

	struct radix_tree_root *radix;
	void __rcu **radix_slots;
	unsigned long radix_slots_len;
	u32 method_key;

	struct ib_uverbs_attr __user *user_attrs;
	struct ib_uverbs_attr *uattrs;

	DECLARE_BITMAP(uobj_finalize, UVERBS_API_ATTR_BKEY_LEN);
	DECLARE_BITMAP(spec_finalize, UVERBS_API_ATTR_BKEY_LEN);
	DECLARE_BITMAP(uobj_hw_obj_valid, UVERBS_API_ATTR_BKEY_LEN);

	/*
	 * Must be last. bundle ends in a flex array which overlaps
	 * internal_buffer.
	 */
	struct uverbs_attr_bundle_hdr bundle;
	u64 internal_buffer[32];
};

static inline int uverbs_set_output(const struct uverbs_attr_bundle *bundle,
				    const struct uverbs_attr *attr)
{
	struct bundle_priv *pbundle =
		container_of(&bundle->hdr, struct bundle_priv, bundle);
	u16 flags;

	flags = pbundle->uattrs[attr->ptr_attr.uattr_idx].flags |
		UVERBS_ATTR_F_VALID_OUTPUT;
	if (put_user(flags,
		     &pbundle->user_attrs[attr->ptr_attr.uattr_idx].flags))
		return -EFAULT;
	return 0;
}

long ib_uverbs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);

struct ib_uverbs_flow_spec {
	union {
		union {
			struct ib_uverbs_flow_spec_hdr hdr;
			struct {
				__u32 type;
				__u16 size;
				__u16 reserved;
			};
		};
		struct ib_uverbs_flow_spec_eth     eth;
		struct ib_uverbs_flow_spec_ipv4    ipv4;
		struct ib_uverbs_flow_spec_esp     esp;
		struct ib_uverbs_flow_spec_tcp_udp tcp_udp;
		struct ib_uverbs_flow_spec_ipv6    ipv6;
		struct ib_uverbs_flow_spec_action_tag	flow_tag;
		struct ib_uverbs_flow_spec_action_drop	drop;
		struct ib_uverbs_flow_spec_action_handle action;
		struct ib_uverbs_flow_spec_action_count flow_count;
	};
};

int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type,
					  const void *kern_spec_mask,
					  const void *kern_spec_val,
					  size_t kern_filter_sz,
					  union ib_flow_spec *ib_spec);

/*
 * ib_uverbs_query_port_resp.port_cap_flags started out as just a copy of the
 * PortInfo CapabilityMask, but was extended with unique bits.
 */
static inline u32 make_port_cap_flags(const struct ib_port_attr *attr)
{
	u32 res;

	/* All IBA CapabilityMask bits are passed through here, except bit 26,
	 * which is overridden with IP_BASED_GIDS. This is due to a historical
	 * mistake in the implementation of IP_BASED_GIDS. Otherwise all other
	 * bits match the IBA definition across all kernel versions.
	 */
	res = attr->port_cap_flags & ~(u32)IB_UVERBS_PCF_IP_BASED_GIDS;

	if (attr->ip_gids)
		res |= IB_UVERBS_PCF_IP_BASED_GIDS;

	return res;
}

static inline struct ib_uverbs_async_event_file *
ib_uverbs_get_async_event(struct uverbs_attr_bundle *attrs,
			  u16 id)
{
	struct ib_uobject *async_ev_file_uobj;
	struct ib_uverbs_async_event_file *async_ev_file;

	async_ev_file_uobj = uverbs_attr_get_uobject(attrs, id);
	if (IS_ERR(async_ev_file_uobj))
		async_ev_file = READ_ONCE(attrs->ufile->default_async_file);
	else
		async_ev_file = container_of(async_ev_file_uobj,
				       struct ib_uverbs_async_event_file,
				       uobj);
	if (async_ev_file)
		uverbs_uobject_get(&async_ev_file->uobj);
	return async_ev_file;
}

void copy_port_attr_to_resp(struct ib_port_attr *attr,
			    struct ib_uverbs_query_port_resp *resp,
			    struct ib_device *ib_dev, u8 port_num);

static inline void ib_uverbs_dmabuf_done(struct kref *kref)
{
	struct ib_uverbs_dmabuf_file *priv =
		container_of(kref, struct ib_uverbs_dmabuf_file, kref);

	complete(&priv->comp);
}

int __uverbs_cleanup_ufile(struct ib_uverbs_file *ufile,
			   enum rdma_remove_reason reason);

static inline void ib_uverbs_comp_dev(struct ib_uverbs_device *dev)
{
	complete(&dev->comp);
}


#endif /* UVERBS_H */